Indicator



May 28; 1929.

w. GAERTNER INDICATOR- Filed Aug. 30, 1928 3 Sheets-Sheei 1 .Fuzenfor:

I My

cfliifys.

May 28, 1929. I w. GAERTNER INDICATOR Filed Aug. so, 1928 3 Sheets-Sheet2 .Zizvenior: W

May 28,1929. w, GAERTNER I 1,715,030

INDICATOR I gFiled Aug. :50, 1928 s Sheets-Sheet 3 H 2526 as liven-tor.-

i Fig.1;

Patented Ma 28, 1929.

I L AM- GAERTNER, or, chrome, .I LLIlnoIs; ASSIGNQR TO THEsAnnrnnnrsoI'E t'hl tIo v to CORPORATION,Y OF:CHIGAGOgIIgLINOIS, a oonrona'rionon IL' InoIs INDICATOR.

n licati n fil'ed A gust 30, 1928. Serial No. 302,978.

My invention relatesto indicators. 7 Among the objects of my inventionare "to provide'improved indicating means ior-a spectrometer or anyinstrument or appliance in which the spacing of the indicia on thescalewill be more evenly distributed than in devices now in use; to provide aconstruction in which the indic'ia may bezniore easily read than inClBVIQGSIIOWYJllllSGgflIlLl '10 :toprovide indicating :means of such a'11a-' V -tur'e"thatthe indicator parts may' be readily "housed. .1

Further objects will appear from-the description and claims. 1

515 In the drawings, inwhich anembodiment' ofzthe invention is shown,

trometer provided with my improved indicating-means;

Fig.2 is a sectionon theline 2-'2 of 'Figl; r 7

Y Fig.8 a" section on :the L-l ne 3 3 of .zEig. 41is ;aihor'izontalsectional viewrisliojw-f "M sing the indicating device andadjustment;

, j Fig. 5,;is arperspective view of'ione iorm of 'prism used; I 1 v jEig. :6 is ;a ;perspectiv e view .of an :iad 11st- 5 cable bearingpoint;

Fig.7 is a section substantially onthe line (II-#17191: Fig.-4;'-and, aI Fig.':8-is an enlarged viewshowing tlieim -*Referring to itheedra-wings in detaihrthe $5 ,constructionsshown :therein comprises a ;triv 'podysupportr2con which the spectrometer is mounted ahousing member-3 {for the prism Y 3'14: .andiassociated partsimounted on :the tri-:

pod, :a collimator tube 5 for. the incoming .rrays,;a sight tubei6 :for;,the' refracted rays,:-

van oselllatably mountedprism-support Tl'on Wh'iQh the prism :ismounted, manuallyadgjustable means for causing oscillation'of said{support .and means for indicating \the 5 5 wave lengths correspondingto the adjusted positionsiof;therprism.

'Ehe {means for causing oscillation of (the iprism :support :comprises amanually;

rotatable shaft 8,',a,-slidablemember 9 having i a screw threadedconnection withithe rotat- V abl e 1116111139128, and an arm :10integral with :the loscillatableprism support 7 engaging litheslile:,9,zand a spring ll fol-pressing tliis vii-icon. againstttheslide;v 1

455 A 1, {Hie iindicatl-ng 'rmeanscompr ses' scaleregulating. thedistance between the split 7 cushionedat each -oi' its extremes' ofmove' sFigure v1 18 a perspectwev ew ofaspeo -a pair-of screws23 mountedin'the bracket carrying camj memberlQ secured to; rotate v ing' this inturn tends to' hold the tapering-end 180i theshait 8 against-the bearingmember-Q19. Thelthreaded jc'onnection bet-ween the'slide 9 and the shaft8 maybe adjusted to-the' right fit by means ofa' s'crew20 forportions'21 oi" the slide. Thesli'de is" mentbymeans of a-paii' oilea'fsprings'22, n i

which springs may be adjustedby means of 7 twhich the pring is mounted.The slide 9 :is held against rotary movement :b n Of a guidel r'od25wmounted ontliis' bracket and engaged abyQ the yoke shaped 'ar1n26of'theslidefl llhe'prism support 7 l is rockably mounted on 'i averticalistud 27 (mountediilthe housing 3".

' The shaft l 8 may be rotated-manually by i -zmeans 0f1 av knob28'securedtoasleeve mein- :ber 29 which inturn is I firmly securedto the"tapering portion ofithe shaft {8 by Ineans s5 oia screwi'3lzthreadedinto the :end of the: i shafts The indicator-v dial 12 has[flaFSlipf frictioniconnection with thevoutwardly,eX-

:tending annular .fiangef 32 .on the vsleevermenr 'ber :29; thisvconnection :being :eflectedibymeans of'a ring member; 33 secured:toiithe .dial by means of screws: illliei fi lge' member 32 is seatedin" an Jannularn'ecess iin J I the dial and engagement offtheflange-with :the walls of the srecess-and with the securing flange 32but :such that when desired the I dial or indicator disc .12

may" be held against movement while the; r I 1 shaft 8 is being turned.Suclieanzopera-tion 6 is sometimes desirable a's',-will.-cbepointed out:moreni detail hereinafter. The means -;for

.iholdingrtheindicator disc against movement when desired comprises aspring zpressed spin 35 ,3) which may whenfdesired vbeam;

pressedinwardly against the; action -0 -n1e coil compression spring 36so thatithejinner end of the pin will press against the router edgeBTofthe indicator'disc'12-and hold it againstemovement, even when theshaft 8 iiiciglzi 1 3 f.

7 point 16 carried bythe 'arm' 10 -'a'g=ainst it the upward extension1'7 of the-slide?) and, l

, 9 5 wing-33' is suchthat/normally'the dial 12' i V will rotate with:the

CH v

and the flange slegeve 29 are. being rotated.

This spri g pressedpin may normally be covered by a cap 7 be positionedin'thc proper angular rela'- l with a certain Wavelength the shaft S'mayits 1'eadingcorresponds to a 'ance of thespectrum and the tion\vitlrrespect' to the shaft 8.; V

Thus'if it is known that a ccrtain'appearance of the lines of thespectrum correspond be turned by means of the knob 28 until theindicator dial 12 has been brought so that certain appearindicatingdial.

maythen be held in this position by means of the holding pin While theshaft 8 is turned until the lines of the spectrum cor- V "1 to theshankofcthexbearing In order to adjust the movement of the prism support7 'with respect to the move. 'mentp-of'the-slide 9 the bearing pointmem-' so that the efl'ectiVe length of this arm 10 may be varied.

7 v responding tort-he 'dial reading are visible in V .thesight tubefiThe operator will then know I that the indicator dialis properlypositioned on the sha-ft 8 and. will release the holding pin topermit'the dial'thereafter toturn With the'shaft. Y 7

ber 18 is adjustably mounted in the arm 10 For this purpose the bearing7 point 39 is madeeccentric with respect point member 7 so that thebearing pomt member maybel secured in variousadjacent positions by,

member-L ,bearing 43 may beprfovided forthe-outerend V l ef the shaft 8.Asmall electric lamp-44 turning, the shank40 in the split portions 41 ofthearm 10. A clamping screw 42 isp-rovidedfOrclampingthesplit'portions141 of the arm against the shank 40 of thehearing If desired,- a suitable antifriction may be provided forilluminating the sight I iopening 45 in the frontcover housing 47 fortheindica-ting dial, the 'bat- A .tery for this lamp being mounted adovvnf plate 46 of the I wardly extending, pocket 48.:

different from spectrometers now in use in .1 Wl11Cl1 the material,'-Wl1osespectrum 1s tobe :The useofthe spectrometer itself is notinvestigated," is Vmounted' and treated so as to permit raysemitted'therefrom or transmitted thereby to be received by the colli- 7i mator tube 5 and redirected by the prism 4--so as to enter sight tube6 When the prism sup-- port 7 is .adjusted so that the prism 4 is at:

the proper angle. When the'knob 28 has been turned so the lines of thespectrum are v properly observed inthe sight tube 6 the reading of theindicator dial '12 is made which Willenable the observer to determinethe nature of the material Whichis being analyzed The prism itself maybeof any suitable prism material, theangle at G'being approXima'tely9Odegrees and the angles at 'Aand B being approximately at 30 degrees 38.ivhich may be removed .to permit the use of the holding pin-Whendesired. By means of this slip connection and disc holding arrangementthe'disc my:

effected by means of a secured" to the rear member .14 in the indicatordial.

the outer part Therays D are refracted at-Epreflectedat F and againrefracted at G. I

he shifting of the indicator member13 is follower-pin 49 (Fig;

13 and engaged in the spiral groove member 13 is slidably mounted ingrooves 50 in the cover .46 of the dial housing so that as the dial isturned the indicator slide will be shifted up or down, depending on thedirection of the rotation of the dial. The

dial is-provided with indicia '51 arranged adjacent to the spiral groove14- to cooperate It Willbe seen thathe constructio i de scribed enablesthe indicia51' on thescale-to be more evenly distributed in the case ofspectrometers and like instruments than in is cylinder indicator devicesI10W.1Il use. To illustrate th1s it will be noted by referring face ofthe indicator The indicator '7 V to Fig. 8 that at the inner part. ofthe spiral scale 90 degrees of movement oft-he dial will, give avariation 1n the reading from 200 cAngstroms, to 202 Angstroms, Whereas;at the outer part of the dial a rotationi of 90 degrees Will give avariation in the reading of from 600 .Angstroms to about 700: Angstroms.This great dificrence between'rthe variation at the inner part"of thedial and pensated I for, actual length'of90 degrees of the outer part ofthe scalejis considerably more than the actual length of 90 degrees ofthe inner:

a 7 515105. With thelcustomar tycylinder indicator part of the"scale.

having ahelical groove inthe cy linder th of the dial is somewhatcom-I1w hovvever,-by'the fact that the z actual length of 90 degrees atoneend'of the cylinder would beflthe same as the actual end of' the:

length of QOdegrees at the-other cylinder and this would result inextremelyunequaldistribution: of theindicia; It will also'be notedthatthe indicia on the disc indicator are on fiat surfaces, making themmuch more'easily'read thanthe': 'indicia on the usual drum or cylindertype of indicator. It will also benoted that'the a disc type'ofindicator is much more easily and simply housed than' the usual-type ofdrum or cylinder indicator.

While I have shown but one invention, itiis obvious that it may beembodied in other formscovered and defined i by the appended claims.'

1. An indicator comprising a manually rotatable member for for anadjustable de ice .126 form of my adjusting thefdevicesand means forindie V eating the reading comprising a-rotatable spirally arrangedscale lof -varying radius and a radially movable pointer'cooperatingwith said scale and means whereby as said manually rotatable member isrotated said scale will also be rotated and said pointer move in or outwith respect to its axis of Y rotation, remaining in cooperativerelation with said scale, whereby a given axial move- 7 ment of saidmanually rotatable member III will cause greater relative movement ofthe,

pointerwith respect to the scale at the outer part of the scale than atthe'inner part of the scale, said means comprising aspiral cam formoving said pointer and a guide for causing said pointer to moveradially,

said spiral cam being provided with spring bumpers at the ends thereoffor cooperation with said pointer;

2. An indicator for an adjustable device comprising a manually rotatablemember for adjusting the device and meansv for in dicating the readingcomprising a rotatable spirally arranged scale of varying radius, ahousing in which said. scale is rotatably mounted and a pointer movablein and out.

with respect to the axis of rotation of the scale cooperating with saidscale, said housing having an elongated radially extending slot therein,and means whereby as said" manually rotatable member is rotated saidscale will also be rotated and said pointer moved with respect to saidaxis of vrotation in or out along said slot, remaining in 00- operativerelation with said scale, whereby a given axial movement of saidmanually rotatable member will cause greater relative movement of thepoint with respect to the scale at the-outer part'otf the scale than iat the inner part of the scal V V An indicator foran adjustable devicecomprising a manually v rotatable member for adjusting thedeviceandvmeans for in- ,dicatingthe reading comprisinga rotatable spirallyarranged scale ofvarying' radius,

a circular housing in which said scale is is rotated said scale willalso be-rotated and i said pointer moved with respect to said axis 7 ofrotation in or outJalong said slot, re-

maining in cooperative relationwith said scale, whereby a givenaxialmovement of said manually rotatable member Wlll cause greaterrelative movement of the pointer with respectto the scale at the outerpart of the scale than at 'the inner part ofr the scale, said'pointerbeing slidably mounted on said cover. p In Witness whereof, Iscribed'my' name. i

' GAERTNER 7 have hereunto sub

